Buttonhole-sewing machine.



No. 785,061. I PATENTED MARJA. 1905.

E. B. ALLEN.

BUTTONHOLE SEWING MACHINE.

APPLICATION FIRED JULY 16, 1903.

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'illlhlllllil /25 jar. I II) Wo'iwssei- P ATENTED MAR. 14, 1905.

' I E. B. ALLEN.

BUTTONHOLB SEWING MACHINE.

APPLIdATION FILED JULY 16, 1903.

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PATENTED MAR. 14, 1905.

' E. B. ALLEN.

BUTTONHOLE SEWINGMAGHINE.

APPLIUATIONT ILED JULY 16, 1903. I

' 6 SHEETS-SHEET 3.

APPLIOATION FILED JULY 16, 1903.

s SHEETS-SHEET 4 filmma- PATENTBD MAR. 14, 1905.

I No. 785,061, i

, B. B. ALLEN.

. BUTTONH'OLB SEWING MACHINE.

1 APPLICATION FILED JULY 1a, 1903.

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PATENTED MAR. 14,1905.

5-. B'. ALLEN. 'BUTTONHOLE SEWING MACHINE.

APPLICATION FILED JULY 16, 1903.

6 SHEETS-SHEET 6.

v "I'll 111111111111! Q $$LW WN UNITED STATES EDWARD B. ALLEN, OF ELIZABETH Patented March 14, 1905.

PATENT OEEIcE.

, NEW JERSEY, ASSIGNOR TO THE JERSEY.

BUTTONHOLE- -SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 785,061, dated March 14, 1905. Original application filed September 20, 1901, Serial No. 75,667. Divided and this application filed July 16 1903. $eria1N0.165,'791.

-T all 11/71/0711, it may concern:

Be it known that I, EDWARD B. ALLEN, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful a side view of a buttonhole cutting and. stitching machine embodying the present invention. Fig. 2is a plan view, and Fig. 3 a bottom view, of the same. Figs. 4 and 5 are detail views showing the connections whereby the barring mechanism is set into action by the feed-wheel shaft. Figs. 6, 7, 8, 9, and are detail plan views illustrative of the mechanism for shifting the needle horizontally in barring and stitching and also illustrative of the connections between the barring mechanism and the stop-motion device. Fig. 11 is a plan view to show the work-clamp and its feeding and shifting mechanism. Fig. 12 is a section on line 12 12, Fig. 11; and Fig. 13 is a detail section on line 13 13, Fig. 11. Fig. 14 is a side view of the rear end part of the machine, and Fig. 15 is a rear end View of the machine with the driving-shaft in cross-section and with the parts in the same positions as in Fig. 14. Figs. 16 and 17 are detail views of a portion of the feeding mechanism.

Referring to the drawings, 2 denotes the work-plate, and 3 the arm, of the machine.

-The driving-shaft 4c is journaled in the upper part of the said arm and has at its for-ward end a crank-and-pitman connection of wellknown form with the needle-bar 7 to impart vertical reciprocations to said bar and to the needle 8, carried thereby. The needle-bar. reciprocates vertically in a horizontally-swinging frame or gate a, mounted on vertical pivots 9 10, the horizontal movements of said needle-bar and needle being for the purpose of forming overseaming and barring stitches without reciprocating the work horizontally. The horizontal movements of the needle-bar frame are derived from a cam-wheel 11, geared to the driving or needle-bar shaft 4, so as to rotate once to each two rotations of said shaft. The cam-wheel 11 is provided with a camgroove 12, entered by a pin or stud 13 on an arm of a lever or rocker I), having its fulcrum or center of motion at 14, and which lever or rocker is connected, through a bar 15, swing ing arm 16, and link 17, with an arm 18 of the said needle-bar frame.

To provide for a variation of the horizontal throw of the needle-bar frame for the purpose of varying the depths of the overseamingstitches, the swinging arm or lever 16 is slotted, and the link 17- is adjustably connected with said arm by a screw 19, the position of which may be varied in said slotted arm to make the connection of said link with said arm nearer to or farther from the screw-stud 21, on which said arm is pivoted.

In forming the barring-stitches at both ends of each buttonhole it is necessary, or at least desirable, to increase the horizontal throw of the needle-bar frame, and the means by which this is automatically efl'ected at the proper times and in proper proportions to the horizontal throw of the needle-bar frame will now be described. The bar 15 is pivotally connected at its forward end to the swinging arm 16 by a screw 22, so as to permit said bar to be moved laterally when desired. The lever or rocker 5 is provided with two pins 23 and 24:, the latter being preferably about twice as far as the former from the fulcrum or center of motion of said lever or rocker. The bar 15 is provided with two notches 25 and 26, having converging walls and the narrow parts of either of which notches maybe brought into operative engagement with its respective cooperating pin by a sidewise movement of the said bar. Thus when the said bar 15 is in such position (see Fig. 6) that the pin 23 is in the narrow part of the notch 25 such longitudinal movements will be imparted to the said bar as are required in the formation of the overseaming-stitches of the buttonholes; but when the said bar is moved laterally to cause the walls of the narrow part of the notch 26 to embrace the pin 24 (see Fig. 8) the longitudinal movements of the said bar 15, and consequently the horizontal movements of the needle-bar frame, will be increased, as is desirable during the times when the barringstitches are being formed When either of the pins 23 or 24 is in operative engagement with the said bar by being embraced by the walls of the narrow part of its appropriate converging notch, the wider portion of the other converging notch affords a proper clearance for the other pin, and it will thus be understood that when one of the said pins is in engagement with said bar the other of said pins is disengaged therefrom.

It is customary in barring straight buttonholes to make the barring-stitches of twice the length of the overseaming-stitches, so that the said barring-stitches extend from outside to outside of the two rows of overseamingstitches, and to this end the pin 24 is shown in Figs. 6 and 7 as being twice as far as the pin 23 from the fulcrum of the lever or rocker L, and thus the horizontal throw of the needlebar and needle will always be proportionately increased for the barring-stitches owing to the fact that said pin is farther from the fulcrum or center of motion of the said vibrating lever or rocker than the pin 23, from which the horizontal movements of the needle-bar and needle are derived, and which lever or rocker carries both of these pins.

The bar 15 is normally held by a spring in such position that the narrow part of the notch 25 will embrace the pin 23, so that the parts will be in overseaming positions, and the said bar is at the proper times automatically shifted to barring position. To this end the bar 15 is provided with a pin 28, arranged to be engaged by a spring-pressed pawl 29, pivoted to the top ofthe upper or vertical arm of a bell-crank lever 30, fulcrumed in a stud or bracket 31 on the arm 3, the lower or horizontal arm of said lever being held by a stiff spring in peripheral contact with a cam 32, carried bya vertical shaft 33, to the lower end of which, beneath the work-plate, the feedwheel is rigidly fixed, so that said shaft rotates with said feed-wheel. The said feedwheel serves, as will be hereinafter described, to impart the proper longitudinal feeding or stitch-spacing movements to the work-clamp as well as the lateral shifting movements the reof necessary to bring the second side of a buttonhole beneath the needle after the first side of such buttonhole has been stitched. Thus by the time the stitching of the first side of a buttonhole has been completed the cam 32 has caused the pawl 29 to move inward, so that its hook will engage the pin 28 on the bar 15, and when a full portion of said cam passes by the lower arm of the lever 30 the stifi spring 35, more powerful than the spring 20, quickly forces the lower arm of the said lever inward, and thus, through the pawl 29 and pin 28, moves the bar 15 outward into engagement with the pin 24 and out of engagement with the pin 23, thereby increasing the throw of the needle-bar frame to form the barringstitches. The cam 32 is a double one, and during the stitching of a side of a buttonhole the lever 30 is gradually moved by said cam to cause the return movements of the pawl 29, so that it can again engage the pin 28 in readiness for a barring operation which is to occur after each side of a buttonhole has been stitched, so as to bar both ends of such buttonhole. During the formation of barring-stitches the feed of the clamp is preferably suspended by automatically suspending the movements of the feed-wheel, as will be hereinafter described.

The number of stitches for each bar is governed through the instrumentality of a ratchetwheel 36, provided with a controlling-plate 37 adjnstably secured to said ratchet-wheel in a well-known manner by means of a set-screw and nut entering a segmental slot 38, with which said wheel is provided. preferably furnished with steadying dowelpins 39, also entering said slot. The ratchetwheel 36 is given intermittent forward rotary movements during the barring operations by a spring-pressed operating-pawl 40, mounted on the lever .or rocker b, and said wheel is at such times held from backward rotation by a spring-pressed detent-pawl 41, pivoted on a screw or stud 42, fixed to the bracket-arm 3. The operating-pawl 40 is provided with a tripping-arm 43, arranged to be engaged by a lug or projection 44 on the bar 15, and said bar 15 is also provided with a tripping-pin 45 to engage the tail of the detent-pawl 41.

Said plate is When the bar 15 is shifted laterally to barring position, (see Fig. 8,) the operating and detent pawls 40 41 are both in engagement with the ratchet-wheel 36; but when said bar 15 is shifted from barring position to stitching position the lug 44 on said bar, through the tripping-arm 43 on the operating-pawl 40, moves said pawl out of engagement with the said ratchet-wheel, and the detent-pawl 41 is simultaneously disengaged from said ratchetwheel by the tripping-pin 45, leaving the said wheel free to be returned to its normal or starting position by a torsional coil-spring 46, connected to a stationary part and to said ratchet-wheel.

From the foregoing it will be understood that when the bar 15 is shifted from stitching position to barring position by the pawl or hook 29 on the lever 30 the pawls 40 and 41 will cause an intermittent forward movement to be imparted to the ratchet-wheel 36 until the controlling-plate 37, by engaging a pin 47' 3 on the pawl or hook 29, disengages said hook or pawl from the pin 28 on the bar 15 and leaves said bar free to be shifted from barring position to stitching position by the spring 20, such shifting of the bar 15 disengaging the pawls and 41 from said ratchet-wheel, as has been described. I

The number of barring-stitches (usually about three or four) to be formed during the forward movement of the ratchet-wheel 36 will depend on the positionof adjustment of the controlling-plate 37 on. said wheel, as has been stated, for the reason that said ratchetwheel always starts forward from the same initial position governed by an upward projection 48, forming part of the detent-pawl 41 and arranged to be engaged by a stop-pin 49 on said ratchet-wheel, these parts limiting the return movements of said ratchet-wheel by the spring 46. Thus by adjusting the controlling-plate 37 on said ratchet-wheel so that said plate will disengage the pawl or hook 29 from the pin 47 earlier or later in the forward movements of the ratchet-wheel a smaller or greater number of barring-stitches may be formed, as may be desired.

The feeding mechanism for the work-clamp will next be described. The driving-shaft 4 is provided near its rear end with an eccentric 50, embraced by a strap or yoke at the upper end of a rod 51, extending into a socket formed for its reception in the upper part of a rod or bar 52, having a jointed connection at its lower end with a horizontally-extending slotted arm 53 of arock-shaft 54, provided with a depending arm 55, with which one end of a pitman 56 has a ball-and-socket-joint connection. The other end of the said pitman 56 is adjustably connected by a set-screw 57 with a slotted swinging arm 58, pivoted on the vertical shaft 33, to which the feed-wheel 60 is secured. The arm 58 has a projection 61 arranged to engage the inner end of a clutchdog 62, the outer end of which is slotted to embrace a circular rib or flange 63 on the lower face of the feed-wheel 60, and which clutch-dog, in cooperation with the vibrating projection 61 and a spring 64, serves to impart an intermittent or step-by-step rotary movement to said feed-wheel.

It is desirable that during the barring operation the feed of the work-clamp should be suspended, so as to pile the barring-stitches on top of each other or to put them all in one place, and it is to this end that the feed-operating connecting-rod is formed in two disconnectible parts 51 52.

' The rod or part 51 is provided with a notch 65 to be entered by a pin or lug 66 on a lever 67, pivoted to the rod or part 52, said pin or lug 66 being normally held in said notch 65 by a spring 68, acting on said lever 67 to couple the two parts of the connecting-rod together.

When the bar .15 is shifted laterally to bar- 3 ring position. as has been described, it engages the lever 67 at its upper end, and thus with draws the pin or lug 66 from the notch in the rod 51, leaving said rod free to reciprocate idly in its socket in the upper part of the rod 52, and thereby suspending the rotary feeding or stitch-spacing movements of the feedwheel 60. When the bar 15 is shifted from barring position to stitching position by the mechanism heretofore described, the spring 68 restores the lever 67 to its normal position to couple the two parts of the feed-operating connecting-rod together.

The feed may be regulated or varied either by varying the position of connection of the pitman 56 with the swinging arm or lever 58 or by varying the position of connection of the rod 52 with the slotted arm 53 of the rockshaft 54 or by utilizing both of these adj ustments.

The feed-wheel 60 is provided in its upper face with a cam-groove 69, entered by a pin or roller-stud 70 'on an arm 71 of a clampfeeding lever pivoted to the work-plate 2 and having a second curved and slotted arm 72, to which one end of a link or pitman 73 is adjustably secured, the other end of said link or pitman being attached to a pin or stud 74, depending from or connected with the workclampbase-plate 75, which slides longitudinally in a transverse plate 76, mounted for a limited lateral sliding movement on the machine work-plate 2. The lever 71 72 serves to impart longitudinal feeding movements to the work-clamp to space the overseaming or covering stitches, as will be understood, and the longitudinal throw of the work-clamp to determine the length of a buttonhole is regulated or varied byvarying the position of adjustment of the link or pitman 73 in the slotted arm 72 of the clamp-feeding lever.

The lateral or shifting movements of the clamp to bring the two opposite sides of a buttonhole beneath the needle are derived from a cam-groove 77 in the feed-wheel 60 through ashifting lever 78, having at its rear end a pin or roller-stud entering said camgroove and preferably having at its forward end an adjustable connection (shown in detail in Fig. 13) with the transverse plate or slide 76 by means of a set-screw 79 entering a slot in said plate or slide. The shifting lever 78 swings on an adjustable fulcrum consisting of a block 80, having check-pieces 27 embracing said lever, said block being adjustably secured in a slot 81 in the work-plate 2. By adjusting the fulcrum-block the lateral shifting movements or lateral throw of the plate or slide 76 may be varied, and by varying the position of the adjustable connection of the forward end of the lever 78 with the plate or slide 76 the working position of said plate may be adjusted or regulated.

The machine herein shown is provided with a stop-motion device which is in principle like that shown and described in United States Patent No. 673,353, granted April 30, 1901, and comprising a clutch-controlling lever 101, carrying a spring-pressed plunger 102, having a portion or finger 113 cooperating with a disk or collar 103, fixed to the driving-shaft 4 of the machine, and with a disk 104, which is movable endwise of said shaft, so as to alford a friction-clutch connection between the driving-pulley 105, loose relative to said shaft, and a fixed collar con the end of the shaft, between which and said disk 104 said pulley is mounted. The disk 104 is mounted between the pulley 105 and the disk 103. fixed to said shaft, said disk 103 having a cam portion 106, a notch 107, and a projection 108, all as set forth in said patent. In the present construction the clutch-controlling lever 101 has a rigid upwardly extending arm 110 and is provided below its fulcrum with a second or forwardly-extending arm 111, to the inward or forward end of which is connected atreadleoperated rod 112, which may be depressed to move the upper end of the clutch-controlling lever inward to disengage the finger 113 from the disks 103 104 when the loose pulley 105 is to be coupled to the driving-shaft 4 to start the machine running, and while the machine is in operation the said clutch-controlling lever is retained in the position shown in Fig. 1 by a latch-lever 114, the hooked rear end of which engages a pin 115 near the upper end of the arm 110.

The forward end of the latch-lever 114 overlies the ratchet-wheel 36 and is in the plane of movement of the barring controlling-plate 37, carried by said ratchet-wheel. Above said ratchet-wheel is a beveled collar 124, held in place by a screw 125 entering the upper end of the vertical post or stud 126, on which the said ratchet-wheel is mounted. The latchlever is provided with a latch 127, pivoted on a horizontal pin 128 and acted on by a spring 129, serving to press the forward end of said latch downward toward the ratchet-wheel 36, the said latch being pressed toward the beveled collar 124 and screws 125 by a torsional spring 130, acting on the latch-lever 114 to press the hooked rear end thereof toward the pin 115 on the arm 110 of the clutch-controlling lever. When the machine is started at the commencement of the stitching of a but-v tonhole, the spring 129, acting on the latchlever 114, presses the latch 127 toward the beveled collar 124 and screw 125, and in so doing the said beveled collar lifts the forward end of the said latch above the plane of movement of the controlling-plate 37 so that said latch will rest against the head of the said screw 125. In the operation of making the first bar of the buttonhole the forward end of the plate 37 coincidently with releasing the pawl 29 from engagement with the pin 28 on the bar 15 passes beneath the slightly-lifted latch 127 and comes into contact with the latch-lever 114 and moves said latch-lever far enough to partly withdraw it from engagement with the pin 115 and to enable the hook of said latch-lever to rest in a notch 131, with which said pin is provided. This movement of the said latch-lever withdraws the latch 127 from the beveled collar 24,- and thus permits said latch to fall into contact with the ratchet-wheel when the plate 37 is moved away from the latch-lever at the return movement of the said ratchet-wheel by its retracting-spring, as has been described, and as the said latch-lever is prevented from resuming its former position by reason of the engagement of its hook in the notch of the pin 115 the said latch will remain in the plane of the path of movement of the plate 37, so that when said plate is again moved forward with the ratchet-wheel at the second or final barring operation for a buttonhole said plate will engage said latch and give an additional movement to the said latchlever, so as to fully disengage it from the pin 115. This additional movement of said latchlever is due to the width of that portion of the latch now interposed between the plate 37 and said latch-lever and which width is about equal to or slightly inexcess of the depth of the notch 131 in the pin 115. This tripping of the retaining device for the clutch controlling lever 101 enables the spring 132 to move said clutch-controlling lever to its unclutching position (shown in Figs. 14 and 15) to stop the machine.

In the operation of the machine the attendant first locates the work in the clamp and then by a downward movement of the treadleoperated rod 112 the clutch-controlling lever 101 moves the finger 113 at the upper end of the said lever inward away from the disks 103 104, thereby releasing the stop-motion device and starting the machine. The buttonhole will now be automatically stitched, barred, and cut, and at the completion of the last bar the latch-lever 114is automatically disengaged from the pin 115 near the upper end of the arm of the clutch-controlling lever 101, H

leaving said lever free to be moved by its spring 132 into stopping position.

The present invention is not to be understood as being limited to the details of construction herein shown and described, as these may be varied widely without departing from the essence of the invention as expressed in the claims hereunto appended.

I do not herein claim the general novel features of the machine herein shown and partly described, as the said genera-l novel features of the said machine are embraced by United States Patent N 0.7 38,591, granted September 8, 1903, of which case the present case is a division, the claims of this application relating more particularly, as will hereinafter appear, 7

to the feature of controlling the stop-motion device of the machine from the barring mechanism thereof.

Having thus described r'nyinvention, Iclaim and desire to secure by Letters Patent 1. In a buttonhole-stitching machine, the combination with a stitch-forming mechanism comprising a horizontally-movable needle-bar and needle, a work-clamp and a feeding mechanism for spacing the overseaming or edgecovering stitches, of the bar provided with two converging notches and 26 and a pin or projection 28, the lever or rocker bhaving the pins 23 and 24 at difierent distances from its fulcrum or center of motion, a rotating cam 'for operating said lever or rocker, the lever provided with a pawl 29 for engagement with said pin or projection 28, means for operating said lever 30 to cause the said pawl to engage the said pin 28 at proper intervals to move the said bar laterally when barringstitches are to be formed, automatic means for disengaging said pawl from said pin 28 I when the barring stitches have been completed,sa 1 d automatic means comprising the 1n termittingly-rotated spring-retracted ratchetwheel 26, carrying a controlling-plate, operating and detent pawls for said ratchet-wheel,

a stop-motion mechanism, and connections;

controlled by said controlling-plate so that when the final bar of a buttonhole has been completed the machine will be stopped.

2. In a straightbuttonhole -stitching machine, the combination with a stitch-forming mechanism, a work-clamp and a feeding mechanism for spacing the overseaming or edge- .covering stitches, of a barring mechanism, a

stop-motion device, and a controlling mechanism fol-the said barring mechanism and .tion of alternate bars the said stop-motion destop-motion device whereby after the formavice will be operated or tripped from said barring mechanism, to stop the machine, said controlling mechanism comprising the intermittingly-rotating ratchet-wheel 36, its controlling-plate 38, the spring-pressed latch1ever 114, the latch 127 pivoted to said latchlever, and means for holding the'said latch slightly elevated during the formationrof one bar at the end of which the machineis not to be stopped, and means whereby the said latch I i is permitted to fall into contact with the said ratchet-wheel at the formation of a second -,bar at the end of which the machine is to be chine, the combination with overseamingstitclrforming devices and a work-clamp, of a feeding mechanism for imparting a relative movement to the said stitch-forming devices I and work-clamp, so as to stitch first one side of a buttonhole and subsequently the other 4 side thereof, a barring mechanism, comprising means for shifting the needle-bar, forming part of the said stitch-forming devices,

laterally, and which barring mechanism is independent of the said feeding mechanism and is operated to form a bar atone end of the buttonhole, after the first side of said buttonhole has been stitched, and subsequently to form other barring-stitches at the other end of the buttonhole after the second side thereof has been stitched, anda stop-motion device connected with and controlled by said barring mechanism and serving to stop the machine automatically when the said second bar has been completed.

4. In a straight-buttonhole-stitching machine, the combination with overseamingstitch-forming devices and a work-clamp, of a feeding mechanism for moving said workclamp relative to said stitch-forming devices so as to stitch first one side of a buttonhole and subsequently the other side thereof, a barring mechanism, comprising means for shifting the needle-bar, forming part of the said stitch forming devices, laterally, and which barring mechanism is operated to form a bar at one end of the buttonhole, after the first side of said buttonhole has been stitched, and subsequently to form other barringstitches at the other end of the buttonole after the second side thereof has been stitched, and a stop-motion device connected with and controlled by said barring mechanism and serving to stop the machine automatically when the said second bar has been completed.

5. In a straight-buttonhole-stitching machine, the combination with a stitch-forming mechanism, a work-clamp and a feeding mechanism for spacing the overseaming or edgecovering stitches, of a barring mechanism, independent of said feeding mechanism, and comprising means for shifting the needle-bar, forming part of said stitch-forming devices, laterally, adjustable means for varying the operation of the said barring mechanism so that any desired number of barring-stitches may be formed in each bar, a stop-motion dev1ce,' and a controlling mechanism for the said barring mechanism and stop-motion device; whereby, after the formation of alternate bars, the said stop-motion device will be operated or tripped from said barring mechanism to stop the machine.

6. In a straightbuttonhole-sewing machine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for imparting relative feeding movements to said stitch-forming devlces and work-clamp to space the overseamlng-stltches first along one side and subsehole, a barring mechanism operating to form a bar intermediate the side-stitching operations, means for suspending the feed of'the quently along the opposite side of a buttoncontrolled by said barring mechanism and op- Q erating to stop the machine while the feed is suspended.

7. In a straight-buttonhole-sewing machine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for moving said workclamp relative to said stitch-forming devices to space the overseaming-stitches first along one side and subsequently along the opposite side of a buttonhole, a barring mechanism operating to form a bar intermediate the sidestitching operations, means for suspending the feed of the work-clamp during the barring operations, and a stop-motion device connected with and controlled by said barring mechanism and operating to stop the machine while the feed is suspended.

8. In a straight-buttonhole-sewing machine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for imparting relative feeding movements to said stitch-forming devices and work-clamp to space the overseaming-stitches first along one side and subsequently along the opposite side of a buttonhole, a barring mechanism operating to form a bar intermediate the side-stitching operations and subsequently to form other barring-stitches, means for suspending the feed of the workclamp, during the barring operations, and a stop-motion device connected with said barring mechanism so that the machine will be stopped when the last barring-stitches have been made and operating to stop the machine while the feed is suspended.

9. In a straightbuttonhole sewing ma chine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for moving said workclamp relative to said stitch-forming devices to space the overseaming-stitches first along one side and subsequently along, the opposite side of a buttonhole, a barring mechanism operating to form a bar intermediate the sidestitching operations and subsequently to form other barring-stitches, means for suspending the operation of the said feeding mechanism during the barring operations, and a stopmotion device connected with said barring mechanism so that the machine will be stopped when the last barring-stitches have been made and operating to stop the machine while the feed is suspended.

10. In a straight-buttonhole-sewing machine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for imparting relative feeding movements to said stitch-forming devices and work-clamp to space the overseaming-stitches first along one side and subsequently along the opposite side of a buttonhole, a barring mechanism comprising means for shifting the needle-bar, forming part of said stitch forming mechanism, laterally, and

which barring mechanism is operated to form a bar intermediate the side-stitching operations, means for suspending the feed of the work-clamp during the barring operations, and a stop-motion device connected with and controlled by said barring mechanism and operating to stop the machine while the feed is suspended.

11. In a straight-buttonhole-sewing machine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for moving said workclamp relative to said stitch-forming devices to space the overseaming-stitches first along one side and subsequently along the opposite side of a buttonhole, a barring mechanism comprising means for shifting the needle-bar, forming part of said stitch-forming mechanism, laterally, and which barring mechanism is operated to form a bar intermediate the side-stitching operations, means for suspending the feed of the work-clamp during the barring operations, and a stop-motion device connected with and controlled by said barring mechanism and operating to stop the machine while the feed is suspended.

12. In a straight-buttonhole-sewing machine, the combination with over-seamingstitch-forming devices, a work-clamp and a feeding mechanism for imparting relative feeding movements to said stitch-forming devices and work-clamp to space the overseaming-stitches first along one side and subsequently along the opposite side of a buttonhole, a barring mechanism comprising means for shifting the needle-bar, forming part of said stitch-forming mechanism, laterally, and which barring mechanism is operated to form a bar intermediate the side-stitching operations and subsequently to form other barringstitches, means for suspending the feed of the. work-clamp during the barring operations, and a stop-motion device connected with said barring mechanism so that the machine will be stopped when the last barring-stitches have been made and operating to stop the machine while the feed is suspended.

13. In a straight-buttonhole-sewing machine, the combination with overseamingstitch-forming devices, a work-clamp and a feeding mechanism for moving said work-,

clamp relative to said stitch-forming devices to space the overseaming-stitches first along one side and subsequently along the opposite side of a buttonhole, a barring mechanism comprising means for shifting the needle-bar, forming part of said stitch-forming mechanism, laterally, and which barring mechanism is operated to form a bar intermediate the side stitching operations and subsequently to form other barring-stitches, means for suspending the operations of the said feeding mechanism during the barring operations, and a stop-motion device connected with said barring mechanism so that the machine will be stopped when the last barring-stitches have been made, and operating to stop the machine while the feed is suspended.

14. In amachine for stitching straight buttonholes, the combination with a stitch-forming mechanism, a work-clamp and a feeding mechanism for spacing the overseaming or edge-covering stitches, of an automatic mechanism for barring both ends of each buttonhole, adjustable means for varying the operation of the said barring mechanism so that any desired number of barring-stitches may be formed in each bar, means for suspending the feeding operation during the barring operations, and a stop-motion device connected with and controlled by said barring mechanism so that the machine will be automatically stopped from said barring mechanism when the last bar of a buttonhole has been formed and while the feed is suspended.

In testimony whereof I aflix my signature in presence of two witnesses.

, EDWARD B. ALLEN.

Witnesses:

ALEX. BOYD,

HENRY J. MILLER. 

